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18228982 = 29114491
BaseRepresentation
bin100010110001…
…0011011110110
31021022010110111
41011202123312
514131311412
61450413234
7310641502
oct105423366
937263414
1018228982
11a320782
12613121a
133a132a5
1425c7302
1519012a7
hex11626f6

18228982 has 4 divisors (see below), whose sum is σ = 27343476. Its totient is φ = 9114490.

The previous prime is 18228971. The next prime is 18228983. The reversal of 18228982 is 28982281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28982281 = 29999389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18228983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4557244 + ... + 4557247.

It is an arithmetic number, because the mean of its divisors is an integer number (6835869).

Almost surely, 218228982 is an apocalyptic number.

18228982 is a deficient number, since it is larger than the sum of its proper divisors (9114494).

18228982 is an equidigital number, since it uses as much as digits as its factorization.

18228982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9114493.

The product of its digits is 36864, while the sum is 40.

The square root of 18228982 is about 4269.5411931494. The cubic root of 18228982 is about 263.1807611976.

The spelling of 18228982 in words is "eighteen million, two hundred twenty-eight thousand, nine hundred eighty-two".

Divisors: 1 2 9114491 18228982